from flask import session


class UserService:

    def sign_in_password(self, username, password):
        if username == 'admin' and password == '123456':
            return True
        return False

    def logout(self):
        session.pop('user', None)

    def add_user(self):
        pass

    def update_user(self):
        pass

    def delete_user(self):
        pass
